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Circles

Circles. Center. Radius. Radii. Diameter. Circumference. Chord. 2 ) d = r. 2r = d. 2 X Radius = Diameter. Radius. +. Radius. Diameter. Diameter ÷ 2 = Radius. A. 1 in. B. 3 in. 3 in. D = ?. C. 6 in. D. 12 in. A. 3 in. B. 6 in. 6 in. D = ?. C. 9 in. D. 12 in. A. 3 in.

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Circles

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  1. Circles

  2. Center

  3. Radius

  4. Radii

  5. Diameter

  6. Circumference

  7. Chord

  8. 2)d = r 2r = d 2 X Radius = Diameter Radius + Radius Diameter Diameter ÷ 2 = Radius

  9. A. 1 in B. 3 in 3 in D = ? C. 6 in D. 12 in

  10. A. 3 in B. 6 in 6 in D = ? C. 9 in D. 12 in

  11. A. 3 in B. 6 in 6 in R = ? C. 9 in D. 12 in

  12. A. 1.5 in B. 3 in 3 in R = ? C. 6 in D. 12 in

  13. How do you find the circumference of a circle? Circumference is the symbol for the Greek letter Pi.

  14. Pi is an irrational number.

  15. 3.1415926538979323846... 3.14

  16. D = π)c Circumference C = πd Diameter x 3.14 = Circumference 3.14 = Pi Pi = π

  17. D = π)c C = πd 10 in 3.14 = Pi

  18. C = πd 12 m 3.14 = Pi

  19. C = πd 9 in 3.14 = Pi

  20. C = πd 8 ft • 25.12 • 2.512 • 24.32 • 24.82 3.14 = Pi

  21. C = πd 15 cm • 32.46 • 46.21 • 47.1 • 74.1 3.14 = Pi

  22. C = πd 25 cm • 75.83 • 57.8 • 5.78 • 78.5 3.14 = Pi

  23. C = πd 10 m • 62.8 • 6.28 • 31.4 • 3.14 3.14 = Pi

  24. C = πd 15 m • 4.71 • 47.1 • 92.4 • 94.2 3.14 = Pi

  25. 40 yds R = ? • 20 • 40 • 60 • 80

  26. 16 m R = ? • 4 • 8 • 16 • 32

  27. 20 cm D = ? • 10 • 20 • 30 • 40

  28. 16 ft D = ? • 8 • 16 • 32 • 48

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